Tegeler Audio Vocal Leveler 500

The Tegeler Audio Vocal Leveler 500 is an optical compressor in the API 500-series format, combining an input transformer, optical gain reduction circuit, and FET output stage for a warm, harmonically rich compression character in a compact, single-slot module. The optical circuit is derived directly from the compressor design used in the Vari Tube Recording Channel, with Tegeler Audio’s own input transformer providing harmonic saturation at the source and the FET stage contributing a final layer of tube-like warmth at the output. Two controls—gain reduction and output volume—alongside a three-position timing switch (fast, auto, slow) cover the full range of tracking and mixing compression tasks without requiring complex parameter management. For Los Angeles engineers looking for a transparent, musical optical compressor in the 500 format, the Vocal Leveler 500 handles vocals, bass, acoustic guitars, and dynamic protection duties with equal composure, and two units can be linked for stereo operation with full recall via stepped potentiometers.

Key Features

• Optical compressor circuit with input transformer and FET stage — the signal path runs through a Tegeler Audio input transformer for harmonic saturation, an optical gain reduction element for smooth, musical compression, and a FET output stage that adds a warm, tube-like character to the final signal.
• Circuit derived from the Vari Tube Recording Channel — the optical compressor section is adapted directly from the VTRC, translating the same opto compression behavior into the 500-series format.
• Two-knob operation — gain reduction and output volume are the only controls, keeping the workflow fast and the compression decisions focused on the two parameters that matter most during tracking and mixing.
• Three-position timing switch (fast / auto / slow) — a dedicated toggle controls the attack and release timing, covering fast transient response for percussive material, program-adaptive auto timing for complex sources, and a slow setting suited to sustained instruments and gentle leveling.
• Three-position mode switch (in / bypass / link) — a second toggle places the unit in the signal path, bypasses it entirely for comparison, or enables the stereo link function for use with a second Vocal Leveler 500.
• Stereo linking and stepped potentiometers — two Vocal Leveler 500 units can be linked for true stereo operation; all potentiometers are stepped for accurate, repeatable recall of gain reduction and output settings across sessions.
• Musical optical compression — micro-dynamics preserved — the soft, program-responsive nature of optical gain reduction keeps transients and micro-dynamics intact even under heavier compression, making the Vocal Leveler 500 effective as a transparent peak-protection tool during recording as well as a leveling compressor in the mix.

Specifications

• Format: API 500-series (mono)
• Weight: 1.19 lbs
• Frequency Range: 20 Hz–22,000 Hz
• Maximum Input Level: +20 dBu
• Input Impedance: ≥2.4 kΩ
• Output Impedance: <600 Ω
• Operating Level: +4 dBu
• Maximum Output Level: +21 dBu
• Dynamic Range: 100 dB
• Maximum Gain Reduction: –12 dB
• Voltage: ±16V
• Controls: Gain Reduction (stepped), Output (stepped)
• Toggle Switch (left): In / Bypass / Link
• Toggle Switch (right): Fast / Auto / Slow (attack & release)